Trait ScalarRef

pub trait ScalarRef<'a>:
    ScalarBounds<ScalarRefImpl<'a>>
    + 'a
    + Copy {
    type ScalarType: Scalar<ScalarRefType<'a> = Self>;

    // Required methods
    fn to_owned_scalar(&self) -> Self::ScalarType;
    fn hash_scalar<H: Hasher>(&self, state: &mut H);
}

ScalarRef is a trait over all possible references in the evaluation framework.

ScalarRef is reciprocal to Scalar. Use to_owned_scalar to get an owned scalar.

Required Associated Types

type ScalarType: Scalar<ScalarRefType<'a> = Self>

ScalarType is the owned type of current ScalarRef.

Required Methods

fn to_owned_scalar(&self) -> Self::ScalarType

Convert ScalarRef to an owned scalar.

fn hash_scalar<H: Hasher>(&self, state: &mut H)

A wrapped hash function to get the hash value for this scaler.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl ScalarRef<'_> for bool

Implement ScalarRef for bool.

type ScalarType = bool

fn to_owned_scalar(&self) -> bool

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'a> ScalarRef<'a> for &'a str

Implement ScalarRef for Box<str>. Box<str> could be converted to &str.

type ScalarType = Box<str>

fn to_owned_scalar(&self) -> Box<str>

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'a> ScalarRef<'a> for &'a [u8]

type ScalarType = Box<[u8]>

fn to_owned_scalar(&self) -> Box<[u8]>

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'scalar> ScalarRef<'scalar> for i16

type ScalarType = i16

fn to_owned_scalar(&self) -> Self

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'scalar> ScalarRef<'scalar> for i32

type ScalarType = i32

fn to_owned_scalar(&self) -> Self

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'scalar> ScalarRef<'scalar> for i64

type ScalarType = i64

fn to_owned_scalar(&self) -> Self

fn hash_scalar<H: Hasher>(&self, state: &mut H)

Implementors

impl ScalarRef<'_> for Decimal

Implement ScalarRef for Decimal.

type ScalarType = Decimal

impl ScalarRef<'_> for Date

Implement ScalarRef for Date.

type ScalarType = Date

impl ScalarRef<'_> for Time

Implement ScalarRef for Time.

type ScalarType = Time

impl ScalarRef<'_> for Timestamp

Implement ScalarRef for Timestamp.

type ScalarType = Timestamp

impl ScalarRef<'_> for Interval

Implement ScalarRef for Interval.

type ScalarType = Interval

impl ScalarRef<'_> for Timestamptz

Implement ScalarRef for Timestamptz.

type ScalarType = Timestamptz

impl<'a> ScalarRef<'a> for StructRef<'a>

Implement Scalar for StructValue.

type ScalarType = StructValue

impl<'a> ScalarRef<'a> for ListRef<'a>

Implement Scalar for ListValue.

type ScalarType = ListValue

impl<'a> ScalarRef<'a> for MapRef<'a>

type ScalarType = MapValue

impl<'a> ScalarRef<'a> for JsonbRef<'a>

type ScalarType = JsonbVal

impl<'a> ScalarRef<'a> for Int256Ref<'a>

type ScalarType = Int256

impl<'scalar> ScalarRef<'scalar> for Serial

type ScalarType = Serial

impl<'scalar> ScalarRef<'scalar> for F32

type ScalarType = OrderedFloat<f32>

impl<'scalar> ScalarRef<'scalar> for F64

type ScalarType = OrderedFloat<f64>